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On Tuesday morning citizens of the world's most polluted city were faced with breathing severely hazardous air that registered in the "critical" level.

Alarming Air Quality Measurements

Several parts of Delhi recorded an air quality index over 500, which equals 10x the healthy limit set by the global health authority.

Certain monitoring stations, concentrations of dangerous airborne particles soared to of 1,800, equating to fifteen to twenty times exceeding healthy levels.

Firecracker Restrictions and Recent Policy Shifts

Since 2020, authorities had implemented a comprehensive restriction on the distribution and bursting of fireworks during the Festival of Lights due to their significant contribution to the dangerous haze that engulfs the capital as colder weather begins.

Nevertheless earlier this year, the newly elected regional government approached the judicial authority to seek a easing of the restrictions.

Officials advocated for allowing "environmentally conscious pyrotechnics" – previously criticized by environmental experts as being only approximately one-third reduced emissions – as a middle ground between "cultural practices and environment".

Judicial Ruling and Implementation

Despite concerns of environmental and health activists, judicial authorities agreed to the request, specifying that green firecrackers could be ignited during designated hours throughout the Diwali.

On Monday night, there was extensive flouting of the regulated periods across the capital, with minimal regulation regarding whether the pyrotechnics being used were actually the eco-friendly variety.

Several recording stations throughout Delhi registered air quality peaking around midnight to some of the worst levels observed during the festival in at least the past three years.

International Effects

The widespread use of fireworks during the festival also sparked a blame game with adjacent Pakistan, with officials in Pakistani the Punjab region partially attributing worsening air quality in their urban centers on hazardous particles coming from neighboring India following the festivities.

Chronic Pollution Crisis

Alarmingly severe levels of atmospheric toxins in the capital have remained as a major challenge for over a decade and a half, with the problem showing no improvement.

Around celebratory seasons, the concentration of hazardous airborne contaminants in the atmosphere has been found to shoot up to 70% higher the peak readings ever measured in the Chinese city, which was formerly considered as the world's most polluted urban center.

Various Pollution Contributors

The problem in Delhi is attributed to a mix of different contributors including heavy vehicle emissions, construction debris, development work, rubbish burning and pollutants from agricultural fires in nearby areas of farming communities.

Within these states, farmers regularly set their fields on fire to prepare for next season, generating dangerous smog that remains stagnant over the metropolitan area as colder air sets in.

Public Health and Financial Toll

The economic and health toll on the nearly 33 million inhabitants residing in the metropolitan zone is substantial, according to numerous investigations.

These hazardous conditions leads to elevated rates of nervous system, heart and circulatory and lung conditions, and can potentially cause malignancies.

The pollution is calculated to be responsible for ten thousand early fatalities per year in the capital.